Improved journal for oscillating propellers



UNITED STATES PATENT OEETCE.

MATTIIEV A. OROOKER, OF NEr YORK, N. Y.

IMPROVED JOURNAL FOR OSCILLATING PROPELLERS.

Specification forming part of Letters Patent No. 6,793, dated October16, 1849.

To all whom it may con/cern:

Be it known that I, MATTHEW A. CROOKER, of the city, county, and Stateof New York, have invented a new and useful Improvement onPaddle-IVheels for Propelling Boats or Vessels by Steam or other Power;and Ido hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the annexed drawings, making part of this specification, inwhich* Figure l is an end view of the paddle as arranged for a boat.Fig. 2 is a side view of the paddles arranged as in Fig. l. Fig. 3 showsthe curve made by the paddles, as seen at Fig. 2, a a a.

Letter A, Fig. I, is the bed-plate; B B, the stanchions or uprightsattached to the bedplates, and which support one end of the studpins orcenters C O firmly.

d a d o d a are the paddle boards or buckets attached to the lower endsof the paddlearms G G G G G G.

D D D D D D are the shaft and cranks which receive the boxes I I of thepaddlearms G G.

In Fig. 2, letter A is the bed-plate; B, the stanchions or uprights, asin Fig. l.

C shows the end of stud-pin to which the arms or beams F F are attachedand on which they move as a common center; D D D, the cranks whichreceive the boxes I I and pass throughthe arms G G G. These arms areformed with a slot or oblong hollow square near the center, in which theboxes I I are placed so as to slide.

S S S are springs placed in the bottom of the slots of arms G G G, andpress against the lowerboxes I I, so as to keep them snug against thejournal D, but to allow the box to slide in ease the arms orpaddle-boards strike some hard substance, and thereby ease the strainupon the cranks.

The arms G and beams F are united at II by common mortise-and-tenonjoints, so as to allow the vibration of the sweep of the cranks D. Theshaft D, Fig. l, rests upon journalboxes b I), which are bolted to thebed-plate A. d d d o, Fig. 8, show the curve that the lower edge of thebuckets describe when in operation.

lllodus operandi: 'lo produce the desired effect by this arrangement Igive a rotary motion to the crank-shaft D by any known motive power orany known mechanical arrangement, as best suits my convenience. Themotion of the shaft gives to the buckets a d a, through the medium ofthe paddle-arms G G G and the beams F F, a latitudinal ellipticalmotion, the whole being arranged upon a vessel so as to allow thepaddles to pass through the water while describing the lower part of thecircle and above the water while moving on the upper part of the circle,so that the resistance of the water to the movement of the paddle givesan impetus to the vessel ou which the machinery rests.

Reversing the motion of the machinery will move the boat in an oppositedirection.

Having thus described my improvement, what I claim, and desire to secureby Letters Patent, is-

The application of springs to the journalboXes in such a manner as toease the strain upon the cranks and paddles when the paddles meet withan extra weight or resistance suddenly, thereby lessening verymaterially the danger ot` breaking the cranks and other parts ofthemachinery, which are combined and operate substantially as herein setforth.

MAT' IIEW A. OROOKER.

In presence ot'n JOHN BULLooK, S. M. BULLOCK.

